The STIHL FS 45 takes the STIHL Service Kit 24 for FS 38, FS 45 and FS 55 (4140 007 4100) as its service kit; Australian sellers list it from A$20.00 as of 28 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your line trimmer
STIHL FS 45
Line trimmer
Confirmed against STIHL's listConfirmed against STIHL's own compatibility list
Not yours? Change
Takes the 4140 007 4100 service kit
Service Kit 24 for FS 38, FS 45 and FS 55 (4140 007 4100) · check the code on your old part before ordering.
STIHL Australia lists Service Kit 24 (fleece air filter, spark plug, fuel filter) for the FS 38, FS 45 and FS 55.
Your line trimmer
Line trimmer
Confirmed against STIHL's listConfirmed against STIHL's own compatibility list
Takes the 4140 007 4100
Service kit · check the code on your old part.
STIHL Australia lists Service Kit 24 (fleece air filter, spark plug, fuel filter) for the FS 38, FS 45 and FS 55.
Other STIHL line trimmers that take the 4140 007 4100
GenuineGenuine STIHL
$20.00
STIHL Australia · 28 OctLowest genuine · STIHL Australia · checked 28 Oct
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by STIHL. Compatible: another brand.Genuine is made by STIHL. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest price · $20.00
STIHL Australia. Every seller we track is listed below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
Other parts this line trimmer takes
- NGK BPMR7A spark plugOpen Power Mowers$5.60
The spark plug. STIHL approves NGK BPMR 7 A or Bosch WSR 6 F; gap 0.5 mm, replace after about 100 hours. Separate from the service kit.
Compare 3 sellers - Bosch WSR6F spark plugOpen Amazon AU$4.00
The spark plug. STIHL's other approved plug for this model (with NGK BPMR 7 A); gap 0.5 mm. Separate from the service kit.
Compare 3 sellers
Compare 2 sellers
AUD, before delivery. Each price shows when it was checked.
Opens STIHL Australia in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it when the air filter is damaged or engine power stays low after cleaning it, STIHL's manuals say; fit the new spark plug after about 100 hours of use, or sooner if its electrodes are badly worn.
After replacing: No reset needed.
How to change the service kit in your STIHL FS 45
Watch the guide or follow the steps.
- 1Stop the engine and let it cool, then set the choke lever to the choke position.
- 2Press in the tab on the filter cover, swing the cover down and clean loose dirt from around the filter.
- 3Take out the fleece air filter and fit the new one from the kit, then refit the cover.
- 4Pull off the spark plug boot, unscrew the plug and screw in the new one (gap 0.5 mm, STIHL says). Press the boot firmly home.
- 5Swap the fuel filter using the hook in the kit box.
Every number this part goes by
- Retail name:
- 4140 007 4100
- Retail name:
- 4140-007-4100
- Retail name:
- 41400074100
- Retail name:
- Service Kit 24
- Retail name:
- STIHL Service Kit 24
Sellers list any of these; they are the same part.
About your STIHL FS 45
STIHL line trimmer — Petrol grass trimmers and brushcutters. Its service kit is the Service Kit 24 for FS 38, FS 45 and FS 55 (4140 007 4100), part 4140 007 4100.
Also in this line trimmer:
- NGK BPMR7A spark plug. STIHL approves NGK BPMR 7 A or Bosch WSR 6 F; gap 0.5 mm, replace after about 100 hours.
- Bosch WSR6F spark plug. STIHL's other approved plug for this model (with NGK BPMR 7 A); gap 0.5 mm.
Where the model number is: The model is on the rating label on the motor housing or the shaft (Ryobi OLT1832, Ozito PXCLTS-018). Take the battery out or switch off before you turn the head over; the old spool's own code is often moulded on it.
Fits these 3 STIHL models
Common questions
- Which service kit fits the STIHL FS 45?
- The STIHL FS 45 takes the STIHL Service Kit 24 for FS 38, FS 45 and FS 55 (4140 007 4100). STIHL Australia lists Service Kit 24 (fleece air filter, spark plug, fuel filter) for the FS 38, FS 45 and FS 55.
- Where can I buy the 4140 007 4100 in Australia?
- We track 2 Australian sellers for the 4140 007 4100; the lowest listed price when we last checked was A$20.00 at STIHL Australia. Prices are re-checked daily and dated on this page.
- How do I fit the 4140 007 4100 in a STIHL FS 45?
- 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A clogged air filter starves the engine of air and a worn plug makes it hard to start; the kit replaces both with the fuel filter.
- Is there anything to reset afterwards?
- No reset needed.
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